What exactly is held in a Custom ISPW File?

I used iClarified last night to jailbreak my iphone. I thought that while going through the process, it would create a custom recovery (ispw) file that would essentially restore my iphone 3g to the way it was earlier in the night, (ie: restore contacts, photos, applications, text msg's, etc) but it seems that this was not the case. I am not sure if I did something wrong, or what.

The custom ISPW file that was created during the process is labeled as "iPhone1,2_2.1_5F136_Custom_Restore.ipsw" and is approx 227mb. Does this sound right? I didn't have any music or video on my iphone, only about 550 photos, a LOT of text msgs, and a LOT of contacts. The text msg's were actually the most important part.

The purpose of the jailbreak was to allow my phone with sim hack to be connected to itunes. It is an american phone activated with att, and I am using the Gevey 3g sim chip to use the phone with Telia in Sweden.

Thanks for any help.
Thaniel