Yes, thank you I saw this:
Intel® Pentium® 4 or AMD Athlon® 64 processor
However, this is unclear as to whether this means a 64 bit processor is required. Mylenium replied that it would run on a 32 bit machine, but again, from the specs this is somewhat unclear.
Furthermore, it is unclear whether LR4 supports both 32-bit and 64-bit environments. I remember installing CS5, some of the programs like photoshop installed in both environments, whereas products like Effects and Premier, only installed in 64-bit environments (I found 32-bit versions on a separate disc) - note: I may be wrong on the specific programs, but I do recall there were some differences.
