This thread was started
10 years ago, and shows a rather obsolete piece of hardware
It requires a computer with a Centronics parallel printer port and a 16 bit operating system, such as Windows 95 or Windows 98.
Computers like that in working condition are a bit rare in 2016.
FM900 radios can be programmed with a modern USB programmer, but unless you are 100% sure the radio is perfect then it'll likely involve a lot more than an EPROM.
The 900 series radios are 26-32 years old now, and like most radios that old they have components dying of old age.
The two big ones in the 900 are electrolytic capacitors (especially the ones in the display and PLL sections) and the VCO / RF front end modules that fail from tin oxidization, losing transmit / going very noisy (VCOs) or going very deaf (front ends).
Both issues are fixable but are rather time consuming, which means $$ if you are paying someone by the hour