Although it is not entirely clear to me what you wish to achieve, your question seems very similar to one received on the helpdesk, and as such, my response is also very similar:
You may not run PicoLog and PicoScope at the same time. However, you may log to a .txt file by using PicoScope in 'Save on trigger' mode (F4). Please note that the Vp-p measurement will not be recorded, however, you can discover the peaks by using the capabilities Excel or similar spreadsheet utility.
You could also achieve a similar result by using PicoLog in 'Fast block' mode, with a restart delay of say 1 second. In this mode, you could set up the desired sampling interval and desired collection time per trigger event.
When recording is stopped, you may select to display just the Max/Min values from the 'spreadsheet view', and define the number of samples between displayed results.
The context sensitive help in PicoLog is very good, so you will find clear explanations of the various settings there.
Please also make use of the PicoLog user manual (http://www.picotech.com/document/pdf/plw044.pdf
) for more general usage directions.
I hope that this is what you need.