I appreciate the replies that my inquiry is getting.
I more or less ruled out dual boot, because we already have XP64 installed, and 
the dual boot solutions I found all advise installing the 32 bit OS first, or 
else it is a hassle.

I am not worried about having LAF use more the 4GB. The reason for installing on 
the machine with XP64 is that we dont have any machines with a 32 bit OS nearby.

I installed VirtualBox, and it came up smoothly. I still have to figure out how 
to get the USB support to work right. Once that is solved, I will install LAF 
and see if it works. This appears to be the least complicated way.

I will post my results to the list.

--aryeh


Johan Henriksson wrote:
> David Kelly wrote:
>> Hello Michael
>>
> this level of memory handling is not something you can hand to the OS.
> 32-bit applications are limited to 2GB on old mac and windows, 3GB on
> linux. the rest can only be used by windows. in fact, the limit is not
> 4GB but much higher (extensions available on newer 32-bit CPUs)
> 
> the limitations are in the variables used internally and can only by
> fixed by recompilation. that is, if the source code was well-written.
> maybe time to consider alternatives?
> 
> /Johan
> 
>> As I understand it LAS leaves the memory handling to Windows so if you
>> are using 64 bit then it should allow you to address more than the 4GB
>> limit on 32 bit systems. I know Leica people watch this list so can
>> any of them clear this up as its quite a hassle to get it working on
>> 64 bit xp.
>>
>> Cheers
>>
>> Dave
>>
>> Michael Weber wrote:
>>> Hey Dave,
>>>
>>> interesting solution, thanks. But regarding the memory handling, the
>>> LAS-AF program is still not able to handle more than 2 GB even on x64
>>> XP since it remains a 32 bit program, or am I missing something?
>>>
>>> Michael
>>>
>>>
>>> David Kelly wrote:
>>>> Hello Aryeh
>>>>
>>>> It is possible to run LAS on 64bit XP but its not easy. When
>>>> installing you run the program from the link below. This spoofs LAS
>>>> into thinking its running on a 32 bit system. The problem is that
>>>> everytime you upgrade your confocal software you need to upgrade
>>>> your workstation software and this spoofing doesn't always work. So
>>>> if you have the time and the inclination you can do it but unless
>>>> you are dealing with very big image stacks and need the extra memory
>>>> I wouldn't bother
>>>>
>>>> http://www.microsoft.com/downloads/details.aspx?familyid=bd02c19c-1250-433c-8c1b-2619bd93b3a2&displaylang=en
>>>>
>>>>
>>>> When this doesn't work there are other utilities that also spoof XP
>>>> version numbers with varying degrees of success
>>>>
>>>> Hope this helps
>>>>
>>>> Dave
>>>>
>>>> Aryeh Weiss wrote:
>>>>> I am wondering if anyone on list has run a *second* copy of Leica
>>>>> LAF (not to acquire from the confocal, but an offline copy) on 64
>>>>> bit Windows? It was my understanding that 32 bit software runs
>>>>> under the 64 bit version, but one never knows.
>>>>>
>>>>> Thanks in advance.
>>>>> --aryeh
> 
>