How to open application with single key (non-command)

[inkletdrops]

I was wondering if there is a possible way to open an application such as chrome or safari with the click of a single button without the use of a combined key such as command, option, control or the fn. Simply one key such as shift or the letter a to open a program. If it is possible please let me know, I would truly appreciate it, thanks. (btw) Ive already looked into the system preference keyremap4mac and I understand that you can edit your own .xml file. I just don't know if its possible utilizing that preference...