Askof released his optimized E@H app to the public. It produces "aboslutely" valid WUs. It was reported that it was 2.3x faster on an AMD Athlon 2000+ XP. 4 hrs to 1 hr 45mins.
I haven't tried it myself yet, but it looks like you just extract it to ur E@H folder in Boinc. you might want to make a backup of your E@h executable just incase.
Here is the link
http://eclient.tvn.hu/alb_A36.zip