Petescarclinic

Hi Donno if this is the correct forum or not as its a bit of both. I'm a mechanic and bought a car diagnostic tool which works using a computer via ebay. i planned to use it on my laptop since buying this ive later learnt the software only works in msdos and must be in fat16 file format and requies two serial ports . my laptop has one and msdos doesnt reconise my plug and play hardware. any advice on this matter would be greatfull as this is my bread and butter