Using ZenCart to sell Photos and images

Hi want to setup a ecommerce portal for selling website templates.

I have gone through zencart , i have installed it and gone through most of the admin section. Some queries that i have are

1. Other than download manager is there any good module which can be sepcifically used for selling online virtual items that can be downloaded after the payment is made.

2. I found that the files kept in /download folders are the files that i can add as product for sale. (Alough its configurable) but the issue is that if i give the direct link to file that is http://foobar.com/downloads/file.zip then also i am able to download the file. Big security risk, any alternative to this, i would like to see a method to disable direct file downloads (leeching)

3. The process of adding file for sale is tedious, i want a method where by i just need to go to product section, name the product, give file name that needs to be uploaded and the image for the file and select the category and this should automatically upload the file to category specific folder. Is this possible ?
   I dont want to go to attributes than select download attribute and then do all lenghty process.

4. Any method to make admin module more simplified?

5. Any suggestion for modules, plugins. scripts etc that can come handful to me?

Thanks
Waiting for your replies.

Viny

few more.

1. how do i set "Products Quantity:" to infinite, since the product is virtual it doesnt matter how many times its purchased and downloaded.

2. How to add multiple products or batch products adding

I also want to sell some scripts and softwares, can this be managed too?