ok, this is my method i use for old laptop cells and such like. i managed to get some 15 year old 1800 ni-mh's back to about 1300mah this way.
1. leave them at 300mah for a few days on a power supply at 1.5v/cell.
2. use a pulse width modulation charger, or the one you can safely charge alkalines with to cycle the individual cells a couple of times.
3. drop the cells from 6 feet onto a concrete floor (positive cap up! thats the weak spot) to knock the crystals off the inside, and charge on the PWM cahrger again. repeat this process a few times. i was shooting mine with a BB gun instead of dropping them too.
4. after a few cycles of this method i simply charged them up using a normal ni-mh household charger, made into a pack and used it. (only for a portable amplifier though. the cells were in such bad shape they only gave about 1C)
ok, it seems destructive but it seems to work...
HPI E-Firestorm - Tamiya TA05 racer (carbon chassis, 10.5 brushless etc) - LRP Blast S10 BX - Revo 2.5r truggy conversion (in progress)