So, people were actually interested in knowing how I got my amazing inbox. Here we go.
Get BetterGmail 2 or whichever is their most latest version. It is a FireFox add-on and it’s really amazing, trust me. I might know and use a 1000 add-ons, like the most weird ones, but better Gmail is good. This is how you download it (for the real retards :)):
Now, restart your firefox to make the add-on enabled (duh!), open the add-ons box from Tools>Add-ons, click on the extensions options, then select better-gmail (it must ideally be selected by-default. Ideally when you restart your fx right after installing only better gmail, the add-ons box will open by itself with the better-gmail selected.), and click on the options that appears when you select it. Then, go to the skins tabs in that box, and select gmail redesigned.
A much easier option would be to install google redesigned :D. Go to globexdesign.com/gr, and install the add-on that comes on the page. It not only redesigns your gmail, without any tweaks, but also redesigns you Gcal page.
If your gmail does not get redesigned by itself, you’ll see a weird icon of a moon-like G, with a small R in the centre of it. Right-click on it, select Gmail, and then Redesigned, v. [nwhatever].
Oh, and if you haven’t got Firefox, you ought to commit suicide in the deepest well you can find, cause you’re missing out on everything you could, from the world of browsers. (And obviously from a way better Gmail inbox ;)).