Easiest way to make actual app files available to her iTunes is just to copy the ones she wants from
C: \Users\USER_NAME\Music\iTunes\Mobile Applications on your profile to a folder on root of the C: \ drive (ie C: \iphone apps). Then she can log in and move them to her iTunes\Mobile Applications folder, then drag them into iTunes. Or use a thumb drive or something like that.
As to whether or not they will sync to her phone, Guess you could try, and the worst that could happen is iTunes says no.
*Edit* I had to put spaces in the file paths cuz there is a smily on here that is activated by : \ without a space
