Yes you'll need the 4GB patch unless you have the GOG version of FNV. Link is here: http://www.nexusmods.com/newvegas/mods/62552/?
I use FOMM only and have no problems, so that will work fine. I would install Loot... oddly not for the sorting ability, you should sort manually, there is a guide on these forums somewhere for sorting. In FOMM if you delete esps/esm from your data folder with FOMM running, and then go and try to edit your load order it will crash, BUT if you run loot via the FOMM menu and close it quickly, the load-order will update the missing esps and will continue to function normally. Its a nice trick because FOMM can take awhile to load from scratch and you will be editing your data directory quite a bit if you are modding seriously.
Those mods you listed all have TTW versions so just use those from this forum. PN will need to be installed from the nexus first, but there are patches for TTW here on this forum. Shouldn't be hard if those are the only mods you are going for.
Remember: Max number of active esm/esp for FNV is 140 and not 255. And the closer you are to 140 the more likely you will have problems with textures and meshes not loading and mods not working properly. My advice is to keep it under 135 mods by merging plugins with this: http://www.nexusmods.com/skyrim/mods/69905/? . Yes it is better to do merges manually in FNVedit but I have had lots of success with this pluggin, I have only found that mods that have MCM menus will have issues with this plug-in so note that.
OH: MUST READ THE TTW FAQ BEFORE INSTALLING ANYTHING. There are lots of mods that every other guide on modding FNV will recommend you to install that will NOT work with TTW.
(I have found TTW conversions made by RoyBatty to be super reliable to work as intended and he does seem to convert all the essentials fortunately. Not to mention he is usually around to answer questions you have about his conversions.)