You could probably get the oem shop manuals on ebay, I got a haynes I believe from advance auto parts, the oem's would have alot more detail, the haynes has nothing on the IRS either.
When I bought my 99 Cobra back in May of '09, an official Ford manual was the first thing I purchased. Ended up finding a complete used set on eBay for about $70 + shipping. Just keep on the lookout.