Mapping Key for keyboard with no regular insert key?

[Michael D. Setzer II]

Got some labs that have Logitec Internet keyboards that for some reason 
don't have an insert key above the regular arrow keys. For some reason it 
has a large delete key? 

With most programs one can turn off num lock and use that insert key, but 
had the windows tn5250 program that would not, so had to come up with a 
reg hack, and mapped the context menu button next to Ctrl on Rigth to 
Insert. 

Was looking to do something similar for something similar for linux, since 
machines also have Fedora 12.  

Thanks.