Assign all premission to other admin user?

I am running Mac OS X Snow Leopard.

user A and B both are admin of the computer.
A has many applications installed.
B is currently created.

Problem: there are many applications that B cannot open even though I already assign "read and write" permission to B when A is log in.

Main question: is there a way to assigned all the permission to B, so I don't need to assign every application one by one.

reason: something on A profile is corrupted, so I created B, later on, I will delete A, but B must have all the permission to access everything before the deletion.

Please Help, Thanks!

Use Disk Utility to repair the permissions. Permissions for the /Applications directory should not need to be changed, ever.