You lost 40kg before? You must have had a bit of fat / water weight back then
10kg in 8 weeks? It can be harder as you get older, the lower you get in bodyfat the *harder* it get's to lose weight.
Try whatever you think will work, but in my opinion, once you drop into a reasonable weight range or hit closer to 3months on a diet than 1/2kg week of *fat* loss is a good longer-term goal.
I'll post a bunch of links, read them if you want it's up to you. The articles are by PTC Frankston, he does have a strong point of view in writing
THE DEFINITIVE GUIDE TO FAT LOSS AND BODY RECOMPOSITION Newsletter 37
Weightloss for Dumbies Dieting disasters
10 Ways to F- Up Your Diet!
Foods that make you look good Nekid
In regard to training I'm a big fan of strength training:
10 GREATEST FITNESS/STRENGTH MYTHS
What not to do in the world of fitness and bodybuilding and supplementing
Why aerobics is not good for you and general steady state cardio work
Anyway, best of luck with whatever works for you.