Stuped Question

But Is there any problem If I leave like that...Just to the ignition wire.

If you have installed the window modules to the IGN wire how are you rolling them up/down by remote? They won't have power unless your in the car in which case you might as well use the switches. All your other components too for that matter. Unless you mean is it ok to wire everything at the ign swtich and not all the way to the battery? In that case it's not the prefered method according to major installers but seeing as the ign,a/c,radio, usually get their power from the constant running up the column anyway you might as well tap there too. samdub is right. Fuse each thing seperately with the value fuse you think should handle the load. Windows 30amps, locks and lights 15 amps. This helps 2 fold. 1) if soemthing does wrong you don't blow you main constant fuse killing the car completely 2) if locks go bad then its fuse blows and the alarm stays powered up. Same with the windows and lights. They should blow fuses on their circuit leaving the other alone. Good Luck!