How can I merge the following conditions into a find request (within a script)?

field1 = Get(ScriptParameter)
AND field2 = 2
AND field3 = >0
AND field4 != 6 (this Filemaker does not support in find-requests...)

The first 3 conditions I can find via
Enter Find mode[]
Set field ...
Set field ...
Set field ...
Perform Search[]

But I don't know how to add the fourth condition because "omit records" only works with PerformFind[Restore], which is incompatible with the first condition...

What's wrong with performing the find and then perfoming another omit within the same script? Don't forget to work within the current found set.
We used to have to do successive finds in the same script. This should be no different.

Or do it in one Find with two requests:

Enter Find Mode []
Set Field [ field1 ; Get(ScriptParameter) ]
Set Field [ field2 ; 2 ]
Set Field [ field3 ; >0 ]
New Record/Request
Set Field [ field4 ; 6 ]
Omit Record
Perform Find []

There are 2 ways of programming the find-request:
1. Enter FindMode[] > SetField[...] > PerformFind[]
2. Perform Find[Restore] //FindRequest specified within

Now as I want to use Get(ScriptParameter) (for the first condition), I have to use way1.
But for condition 4 I have to use way2 because saying "does not equal 5" only works with OMIT, and this only works with way2.
Then I have to combine the two, which I cannot do via

Enter FindMode > SetField[field1; Get(ScriptParameter)] > PerformFind[] > ExtendFoundSet[Restore] /where Restore is " OMIT field4 = 5 "

because this would be an OR-search rather than an AND-search...

It is not necessary to restore the omit condition. See my above post.

(Perhaps you're having trouble with the forum too? It seems to give me a different set of replies everytime I refresh it.)

Not sure exactly what you're trying to do, but I more or less agree with the other poster, since I just had to do something like this. However, I opted for a very clunky, but workable, scripting solution, which involved first getting my basic found set through a standard find. Then, I used a looping script to mark up the found set a certain way (to ID the records I wanted to omit); Then I used a second looping script to omit the records so marked.

Again, clunky and a bit tricky to write; but, for my purposes, it worked fine.