Looking at your post, are you planning to use 32mm gauge track with 200 code rail or 16.5mm gauge using 100 code rail ?
If the larger. I would probably not bother with the made up track to start with but build it from scratch. Peco have a lot of components available including rail, chairs/rail fittings and plastic sleepers if you want them.
By building from scratch you have the chance to customize the track by widening the gauge slightly on curves and adding check rails etc.
With the large code rail a rail bender would be a good investment if you have a lot of track to lay while a suitable set of gauges (which could be homemade in hard timber ) are essential.
If using 16.5mm gauge I would use standard track (100 code) as Ian does.
For some unknown reason, at my local hobby store a packet of rail is more expensive that the equivalent length of flex track !
The rail could be held down to wooden sleepers using track spikes
http://www.micromark.com/track-and-trac ... plies.html
Also on eBay:
http://www.ebay.com/sch/sis.html?_kw=HO ... w+3%2F8%22
There is a discussion on another forum which could help (hinder) you in your choice of method:-
Hoping that I haven't given you too many options but track laying is a big topic and no single answer is the suitable for everybody.