Hello SanAndreasP,
I followed a you-tube video (
) , which explained how to download/ install "Forge".
Installed as per instructions, deleting META-INF and re-starting Minecraft.
All seemed to install OK, but no Menu option.
Have also added the jar/zip file into a self created "Mods" folder under %%\.minecraft\bin - still no luck.
Have tried "texture Packs" and they work OK (but not 512x512!!)
Thanks for all help,
train_wizard