http://bugs.winehq.org/show_bug.cgi?id=3573
------- Additional Comments From hallo@michael-kaufmann.ch 2006-15-01 16:46 ------- UnRAR 3.51 can extract multipart rar archives without any problems; probably you use an outdated version. The unrar program is available as source code. Download it at www.rarsoft.com -> RAR -> Extras -> UnRAR source.
The linux version of RAR (Shareware) hasn't got a nice GUI but works fine. According to the order form, the licence key of the Windows version is also valid for the Linux version.