http://bugs.winehq.org/show_bug.cgi?id=7636
------- Additional Comments From lich@math.spbu.ru 2007-06-03 08:54 ------- If the point is the large files, then winhelp should be rewritten completely. It process them VERY slow, unlike windows native one.
If you really need to view them fast and perform search, you may try decompressors like http://www.geocities.com/mwinterhoff/helpdeco.htm