kri5ty, do go and see someone about your dizziness. It really sounds as though you ought to stop driving. As inconvenient as that would be, you have to think of safety.
sevensevenseven, that's a crazy amount for curtains! If you can get some curtain heading tape (it's very cheap, from local haberdasher, John Lewis/department store), the tailor who sits in most drycleaners will be able to sew it onto tab-top curtains, or even a length of cloth, for you! You will also need to add curtain heading tape to blackout material (which is coated cloth, so doesn't fray if you cut it, therefore doesn't even need hemming; in fact, the more you sew blackout lining, the more little holes you punch in it!). Read through the bit below about lining up the curtains for hanging, so you know how long to cut the lining (I've marked it with an &) You will also need curtain hooks. I use the plastic "swish" hooks, which won't rust onto curtains and are quite robust enough for these materials.
Using the side threads on the curtain tape, you then cinch up both sets of curtains to fit the window (and tie them off), and then look at the curtain heading tape. Across the tape, there should be two or, more usually, three rows of loops, across the length of the tape. Calculate how many hooks you need for each curtain (not many, if it's such a narrow window. If you've cinched to the window width at the last step, the bunching will have been taken care of neatly by the heading tape). You need this number of hooks for each "piece" (2 x curtains, 2 x blackout lining).
On the blackout lining, push your curtain hooks through the middle row of loops, at the intervals you have decided. On the curtain, push your curtain hooks through the top row of loops.
&Then lie the blackout linings against their respective curtains, curtain-tape-side to curtain-tape-side (hooks to hooks), with the curtain slightly longer at the top, because that is going to hang from the curtain rail, with the blackout lining hanging from the curtain, against the window.
Hook the blackout lining's hooks onto the middle or lower row of the curtain's heading tape. You can line the hooks up with each other, or go either-or, whichever you think will hang better. And you can change it later, since you have not sewn anything together. Blackout lining is £5-10/metre, so it is not the end of the world if you muck up a piece of it and need to re-do a lining (I've cut them too short before now, and it's infuriating, but not too expensive!)
Once your two-piece curtains are secured, hang each whole piece (consisting of curtain and lining) from the curtain rail, curtain side out, lining side in.
Any curtain with curtain heading tape can have a blackout blind made for it in this way. It's a bit pointless to do this with tab-tops, though, since the light will come through at the top of the window 
, and as for those stupid eyelet curtains, it would be a real faff trying to blackout-line those... and light would still leak in! As you can tell, I like traditional curtains!
I hope that's helpful, but if you need any pictures, let me know.