Can we change the syntax of tree structure in 1.6.2?

[vayal]

Now in testlink the tree structure after adding a test case is like this,

product name->component name -> category

can we change this structure to
Product name-> Team name -> component name -> category ?

if possible, please let me know in which file i should make the changes?

[fman]

Not Possible, upgrade to 1.7 where you have N-level tree

[vayal]

but i think in some post you only mentioned, 1.7 will be too slow compared to 1.6.2. I have more than 10000 test case in my testlink. So is there any solution?

Also i could see some one posted regarding, how to delete multiple test case at a time? no one replied for that. Could you please let me know how to do it?