Summon Templates: Need one for each of the 8 elemental incarnations + black and grey touched.
Make the tokens and place them on the Summoned map and you can use the Summon Tokens macro.
Change All Races
The framework does nothing with races unless you are talking the Type/Subtype tab and then that is easy by changing the Table CreatType to reflect the races you want.
Add a bunch of custom skills, spells and feats.
For skills you can add whatever you want in the Skills table. There is a post by Lindsay here on how to do this. Spells are not included in the framework per se. They are included in one of the Drop-In extras Lindsay includes with his FW. As for feats, my suggestion would be to ignore them unless you can make them using the ActiveMods macro. checking a box for Spring Attack just to show you have it is a waste of programming time when you can use a true Character Generator program such as PC-Gen or HeroLabs or Red Blade(IIRC).
Most classes are the same but a few are different - editable features on classes maybe?
I have no clue what you mean by this as classes are not even worried about in the FW. To the FW a Fighter is the same as a Sorcerer.
Any way to add an auto fail chance whenever a divine spell is cast?
See above about spells.
Is there a faster way to create monsters and attacks?? It seems to take me forever to add them in here, and its all custom creatures.
Yes, use the Statblock2Token Macro if using Pathfinder. If using 3.5, take the Pathfinder Statblock2Token macro and change it to fit your needs.
Add a custom prestige class?
My assumption is this is for spell purposes and if so, see the spell comment above.
I don't know of many that use Psionics in play and if they do, they do it by hand. I have a player in my campaign that is one and we take care of it using HeroLab to track how many points he spends and such.
Also, any kind of tutorial videos or guide on this?
There was one that Imperium made a long time ago so it will be semi out of date, but other than that no.
If you do need help as to the FW, I can make some time to go over it with you. Probably not this weekend though.