I can always choose "Customize" when it asks, but the problem is trying to get the blank DVD to even show up on the left.
After spending a few minutes doing some research on this rather confusing scenarion, it appears the goal is to create a single-layer sized DVD version of Leopard Install.
It seems like you got stuck somewhere in here: You correctly burned a bootable copy of the ".boot.sparseimage" you optained, which has all the "fluff" printers/languagues removed. It does boot, and you can get to the "Customize..." button. Then, you tell it to "uncheck" Printers and unneeded languages. What happens after that? It can be a very slow install according to the instructions
I've found which I think I now have compiled in one place. I think one big problem is the "Customize..." button and blank DVD happen at different places during the process. They're isn't any place for the DVD when the button is available and vice-versa.
I think I have the full procedure for creating a SL DVD version figured out here, so you can point to what step when wrong:
1) Get original Leopard Install DVD
2) create an 8GB sparseimage using Disk Utility
3) Using Restore, put the Leopard DVD in the Source field, and the "leopard.sparseimage" in the destination field.
4) click Restore - wait about 10 minutes
You now have an exact image of Leopard Install DVD - you could Restore to DVD DL or a hard drive partition and boot to it, at this point (a nice thing to have).
Now, you need to remove the "baggage" from the full DL DVD.
6) Using Diskutility, select leopard.sparseimage and click
mount. It should now show up on the desktop. We will be deleting the XCode Tools directory which is at the root of the image, all sets of printer drivers, and unnecessary language packs. Navigate to "Optional Installs" and delete "Xcode Tools. Now, use the Finder "Go to Folder..." to navigate to the hidden System folder with "/Volumes/[disk name]/System/Installation/Packages" Delete all printer driver packages (backup any you might need) and delete all language packs that aren't English or your native language, except for AsianLanguageSupport. Don't forget to "
Empty the Trash".
Unmount the leopard.spaseimage
7. Disk Utility - create another new sparseimage of 4.7GB and call it "boot" (file created will be boot.sparseimage).
Mount this. Use Restore. Put the previously modified leopard.sparseimage in Source, and the
mounted "boot" volume (not the file boot.sparseimage) in Destination. Click Restore, wait about 10 minutes.
Unmount "boot"
8. Now you can burn the DVD SL. Select the boot.sparseimage (this should still be in the image list in the left column). Click on the Burn button and wait another 10 minutes or so. Leave the DVD in the burner.
9. Now you can do the reboot "holding down the 'c' (or hold down the opt and select the boot disk volume). It will take MUCH longer to boot, as you've probably read. The only required step is to use the "Customize..." button to deselect all additional languages (except the AsianLanguagueSupport) and all printer drivers. Hopefully, the install will continue from there, normally.
If, on the other hand, you "found" the boot.sparseimage already, you would skip all the way to #8. I have a feeling you're somewhere between having a full Leopard DVD and some sort of sparseimage version of it.
A short note of caution: If you don't own the Leopard install DVD, obtaining the modified sparseimages (or even the original images) through torrents is most likely a violation of the MR rules & terms of use. (I don't have the exact quote, but you get the idea.) hint: The two main pieces of reference I used to figure out what it is you're trying doing came from sites referring to torrents and specifically mentioning "Leopard boot.sparseimage" and same or the very steps you quoted (as in "included with this torrent").
I'm still trying to give the benefit of doubt, but there were a lot of unanswered questions about the "why" and "what" of you're trying to do.
edit: I apologize, if I'm off base, though.
Anyway, this ran way to long (late/early), so hopefully what I cobbled together will help you out, or at least get you past some point of stuck-ness.
Would i be able to convert the image to a .dmg and burn it that way? Can Disk Utility do that, or do I need to get a .DMG converter? I see quite a few free ones.
Disk Utility can convert to and burn DMG. It can also burn .toast. Toast can burn either DMG, sparseimage, or toast.