srs, how to reset?

hello all, i asking for some advice on buying a handheld computer {or whatever it called} to reset the srs light. ive seen a few on ebay but not really sure what i need to buy. i read here before somewhere that some people have them and keep in glove box.but what do you have, and what do i need?. so any help greatly appreciated folks.

I use a Toshiba Libretto CT100 overclocked to 266mHz and running Windows Me. It's the size of a VHS video cassette and it's like a minature handheld PC but with a decent size screen and normal keyboard.

Any PC running Windows and preferably has an Rs232 serial port (9 pin D-type) will do the job, you just need to find the one that suits your budget and size requirements.