Im not 100 % new to modding but im not very far in and im very un educated with TES CS my cs doesnt load the master file it says the exe is a higher version how should i go about fixing this?

If you installed Shivering Isles, you will need to install CS 1.2.404. Also, most(perhaps all) of currently released mods are made with CS 1.2.x.

Same thing happened to me. You just have the older version of the CS, download the latest and all should be fine.
Also if you plan on using OBSE you need to create a shortcut and launch the CS through the OBSE shortcut.

alright thank you i got the master fiel working and everything and ive been toying around with the construction set so far ive made about 6 successful mods from new races to custom chests and i also took over leyawin as my own personal test ground XD but for some reason whenever i try to use a mod from tesnexus or somewhere once in game the items are all missing there meshes and im pretty sure i did it right they just dont show up for some odd reason they show up as caution signs and i was told that it meant the meshes were not there

Have you installed them properly? I also recommend getting ArchiveInvalidation Invalidated.

That has no effect on meshes, it's only used for replacement textures.