A) To get a better chance that the right people will look at your post, you should change the title from
Problems using linex
Problems using Linpus Lite
To change the title, click the EDit button at the bottom of your original post, then click the "go advanced" button. Then edit the title field and save.
B) The Linpus website pretends to have a manual available for download from
But when I tried, it didn't work. Maybe that download page is fake, but maybe I just did it wrong. You should try.
Also, there ought to be a manual for download on the Acer website as well, but I didn't search.
C) Your first two questions would be trivial to answer for any distribution the experienced Linux user answering has tried or even has looked at the manual for. But they are the sort of thing likely to be so different in Linpus Lite vs. the distributions I have used, that I can't try to answer. That is why you need to attract the attention of someone who knows some specifics about Linpus Lite.
D) Some of the manufacturer pre installed Linux distributions are so bad that the right answer is to select a better Linux distribution, download and burn the install CD for it and use that to wipe and replace the software on your system. I don't know if that is true for the Acer Aspire 1, whether its pre installed copy of Linpus Lite is a lemon nor which other Linux distribution would work well. Without "Acer Aspire 1" in the title line of your post, you're not likely to get the attention of anyone who can answer that.