well i think ive just found a solution
i downloaded this http://drivers.softpedia.com/get/JOYSTICK-GAMEPAD-WHEELS-and-TABLETS/Archos/Archos-7-Tablet-Firmware-ECLAIR.shtml
this is for the v2 but there other yar files for firmware for the v1
i then put it on an empty sd card, started the tablet up and waited till i got the dreaded error message, i then put the sd card in and underneath the error message was another box asking if i wanted to install.
so pressed force close on the error message and then quickly pressed install, i did that a couple of times and now it is installing, its taking ages and might not work but ill be back to let you know