well dear your device is in ADFU or you can say that in recovery mode and most the time it is difficult to install it in windowXP,that is my personal experiance.So if you have the window 98 then it is easy to install it becasue there you can give any ADFU driver and install it and then any MP3 UPDATE TOOL will recognise your player for the firmware.
Most importantly you didn't mentioned that what is the number of the CPU............is it ATJ2091N or AK1025 ..........well for both the links are as follow.
This is the firmware link if the CHIP is ATJ2091N
http://www.s1fw.com/plus/download.ph...&aid=512&cid=3.
and here is the link for AK1025
http://www.s1fw.com/plus/download.ph...&aid=511&cid=3
well good luck for the moment