Much like removing the com.handson.app.nascar, com.palm.app.sprintportal and com.handson.app.nfl, you can also remove com.palm.app.firstuse.

I haven't seen an issues with it yet, and its 11mb!

Follow the instructions at: Patch Launcher Hide-Delete The NASCAR App - WebOS Internals

Just change the name to: com.palm.app.firstuse