Prom burning

[JN]

I'm new to the list.  My question is how do these guys such as Fastchip, TPIS etc. program a prom chip.  I have an 89 Corvette that has the blue push in type prom.  Currently I have a prom from fastchip.  He orders proms from GM, erases them and then reprograms them.  What do you use for this?  Is this considered hacking or is there a program you can buy?  My 89 needs returned because it is running a little rich after ported heads, headers and a cam.

Jason 
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